Automatic train-stop.



J. B. BLACKSHEAR.

AUTOMATIC TRAIN STOP.

APPLICATION FILED JUNE 23. I9l6.

A 1,210,140. Patented Dec. 26,1916.

2 SHEETS-SHEET I.

A WITNESSES INVENTOR MVMZ. I r BY A TTORNEYS J. B. BLACKSHEAR.

AUTOMATIC TRAIN STOP.

APPLICATION FILED JUNE 23.19l6.

1,210,140.' Patented Dec.26,1916.

2 SHEETS-SHEET 2.

By J,

- ATTORNEYS TJAMES BAYARDBLACKSHEAR, or HONOLULU, TnnRIronYor HAWAII.

7 AUTOMATIC rnarn-sror."

Application filed June 23,1916. Serial No. 105,328

To all whom it may concern:

Be it known that I, JAMES B. 'BLACK 7 SHEAR, a citizen of the Unitedstateaanda resident of Honolulu, Territory of Hawaii,

5 have invented a new and Improved Automatic Train-Stop, of, which the following is a full, clear, exact description.

My invention relates to an automat c brake-applying means to be arranged in connection with the air-brake system of a train and including a sprmg-pressed plunger arranged to travel on atrack rail and adapted, upon leaving the track,'to open a relief valve in the train system for releasing the pressure, thereby automatically applying all the brakes on the train in case any car or truck should be derailed. I

My invention relates more particularly to a device for the purpose mentioned, having provision for detaching the valve controlling the air outlet whereby to quickly cause an emergency reduction of the pressurefor instantly applying the brakes.

The invention will be particularly explained in the specific description following.

Reference is to be had to the accompanying drawings forming a part of this specification in which similar reference characters indicate corresponding parts in all the views. Figure l is a fragmentary side elevation of a car showing my invention applied; Fig. I 2 is a transverse vertical section on the line 22, Fig. 1, on an enlarged scale; Fig. 3 is is a fragmentary perspective view showing the valve detached to release the pressure; Fig. 5 is a detail in vertical section showing the spring-pressed plunger and the guide fixture therefor; Fig. 6, is a diagrammatic, inverted plan view showing the invention applied to a car.

In carrying out my invention in practice, a vertically disposed plunger 10 is provided having a wheel 11 thereon at the lower end adapted to travel on a track rail A. Said plunger has vertical movement in a fixture 12 and is subject to the pressure of'a spring 13 housed in said fixture and tending to depress said plunger. The fixture 12 is secured to each truck B or otherwise secured in a manner to be not subject to the vibrations of the car body. In the present example a W bracket 14 on said fixture is formed with bolt holes 15 to receive bolts 16 for securing the bracket to a. member of the truck.

a perspective view of the attachment ;'Fig. t

On the plunger 10 is provided a fixed lateral' arm '17 movable with the plunger in a vertical slot 18 in the fixture 12. Disposed 1n the path of movement of the arm 17 is an arm 19 on a cap 20 which constitutes a valve for closingthe end of. a branch pipe 21 in communication withthe train pipe 22. Each branch 21 is provided with a valve 23 whereby to cut out an attachment on a particular truck in case said attachment becomes inoperative from any cause. The cap Specification of Letters Patent. Patented Dec. 26, 1916.

20 is subject to the air pressurein the pipe 7 connection 21. To retain the cap 20 in position until engaged by the arm 17 of the plunger, said cap is formed with a bayonet slot or slots 24L receiving a pin or pins 25 on a nipple 26 on thefixture 12 in communication with the pipe 21 through a transverse open ng 1n said fixture.

I In operation, in the event the truck B should be derailed, the wheelll of the plun ger will leave the track rail A, whereupon the spring 13 will depressthe plunger, and by contact of the arm 17 with the arm 19 of the valve cap 20, will turn said cap to a position to disengage the same from the pin 25, thus permitting the pressure in the pipe 21 and nipple 27 to detach the cap 20, therei i by releasing the air pressure and consequently, reducing the pressure 1n the tram pipe to automatically apply the brakes throughout the train.

The detachment of the cap provides a" sudden release of theair pressure thereby insuring the emergency application of the brakes. o r A chain or equivalent, connects the cap 20 with the car truck Or the like to prevent loss of said cap; said chain is indicated by the numeral 27. To prevent the weight of the arm 19 of the cap 20 from turning said cap and releasing the same from the pin 25, said cap has a counter-balance arm 20 at the opposite side fromthe arm 19.

It is to be understood that the branch pipe 21, in practice, will usually be a flexible hose.

Having thus described my invention I claimas new, and desire to secure by Letters Patent:

1'. The combination with a car and its train pipe, of a branch pipe extending laterallyfrom the train pipe to a truck of the car, a fitting mounted on the said truck, a valve on said fitting controlling the said branch pipe to release the air therein,

spring-pressed plunger vertically movable on said fitting and having an element in the lower end adapted to travel on a track rail, and means associated with said valve and plunger to cause an opening of the valve by a depression of the plunger, said means including coacting trip members on the plunger and valve.

2. A train stop including means to establish connection with the train pipe, said means having an outlet, a valve controlling said outlet and detachable under the pressure in the said connection, said valve being mounted to be turned, means detachably retaining the valve in position against the said pressure, a depressible plunger adapted to run on a track rail, said plunger and valve having co-acting members adapted for engagement by depression of the plunger to turn the. valve to a position to disengage said retaining means to cause detachment of the valve by the air pressure thereon.

3. A train stop including a vertically movable plunger adapted to run on a track rail, a spring tending to depress the plunger upon leaving the rail, a lateral arm on said plunger,- a valve mounted to turn and having an arm in the path of movement of said plunger, means to establish communi- Copies of this patent may be obtained for cation With a train pipe, said means having vdisposed in the path of the arm on the plunger and being subject to the air pressure at said outlet to detach the valvewhen turned by the plunger.

4i. In a train stop, a fitting having means whereby to secure the same to a car truck, said fitting having a transverse air outlet, and a nipple on said outlet, means to connect the train pipe with said nipple, a cap fitting over the end of said nipple to turn thereon and constituting a valve controlling said outlet, a plunger vertically movable in said fitting and adapted to run on a track rail, a spring tending to depress said plungel, a lateral arm on the plunger, the said fitting having a vertical slot in'which the said arm is movable, a spring tending to depress said plunger uponthe latter leaving. the track rail, the said valve having a lateral arm in the path of the plunger arm, and a lateral pin on the nipple, the said cap having a bayonet slot receiving the said pin.

minis BAYARD BLAGKSHEAR.

five cents each, by addressing the Commissioner of Patents, Washington, I). G. i 

